Pneumatic hoist.



PATENTBD JAN. 23, 1906.

J. rL. FILLING. PNEUMATIG HoIsT. APPLICATION FILED DEOZ'I. 1904.

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No. 810,884. PATENTED JAN. 23, 1906. J. L. FILLING.

PNEUMATIC HOIS'I'. APPLICATION IILBD Imc. 27. 1904.

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WIZWESSES v IWVEVTR UNTTED sTaTEs PATENT oEErcE.

JAMES LOWE FILLING', OF BUOYRUS, OHIO, ASSIGNOR TO FILLING AIR ENGINE COMPANY, OF DETROIT, MICHIGAN, A CORPORATION.

PNEUMATIC HOlST.

Specification of Letters Patent.

Patented Jan. 23, 1906.`

Application filed December 27, 1904. Serial No. 238,536.

acitizen of theUnited States, residing at Bucyrus, ycounty of Crawford,.State of Ohio, have invented a certain new and useful Improvement in Pneumatic Hoists; and I declare the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in thev art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to pneumatic hoists; and it consists in the improvements hereinafter s ecified, and pointed out in the claims.

In t e drawings, Figure 1 is an elevation of a hoist embodying my invention. Fig. 2 is an end view of the same looking from the left of Fig. 1. Fig. 3 is an end View of the drum. Fig. 4 is a detail of the mechanism for returning the throttle-valve stem to its closed position. Fig. 5 is a plan view of the mechanism shown in Fig. 4. Fig. 6 is a detail of a part o thle automatic valve governing the supply o o1 A is the framework upon which the hoisting mechanism is mounted.

B is the motor, and Bf the throttle-valve governing the supply of compressed air to the motor B.

B2 isa lever-arm by which the throttlevalve is operated.

B3 is an oil-cup.

b3 is a cock for regulating the flow of oil from the cup B2. v

b is a stem by which the plug b5 ofthe cock b3 is operated.

b2 is an enlargement on the outer end of the stem b', through which enlar ement there is an aperture into which fits an slides a rod b, which rod is pivoted at its lower end to an arm b, extending vertically upward from the center of the lever-arm B2.

c c are cross-heads guided in vertical *ways` in the standards C and having guide-rods C2 C2 fitting into apertures through a frame- .work B5, so as to `'in said apertures.

e adjustable longitudinally the cross-heads Ac c upward until the nuts C4 contact the frame B5. c

D is a double cam upon the lever or arm B2,

one side of said cam being provided with a l cam-surface acting against one of the crossheads c to turn the arm B2 1n one direction,

and the other side of said cam acting against the other of said cross-heads c to turn the arm B2 in the other direction.

When the arm B2is turned in one direction,v

the supply of air is admitted to the motor B, and at the same time the stem b is oscillated,

by means'of the rod b4 and arm b, to turn the j When the lever-arm B2 is released, the crossheads c c return it to its horiaontal osition, closing the exhaust and the passage Vrom the oil-cup B3. The normal position ofthe leverarm B2 is regulated by adjusting the nutsC4 on the rods C2, so as-to fix the relative positions of the upper limit of the travel of the cross-heads c. i

E is the hoisting-drum. U on the drum E are formed two sprocket-w eels E E of larger diameter than therest of the drum and two s rocket-wheels E2 E2 of equal diameter and o less diameter than the equal sprocket- Wheels E E.

E yF represent a chain engaging the teeth of the sprocket-Wheels onthe drum E with V.two strands,.a loop of the chain hanging from each side of the drumE. In one of the loo s 1 .sprocket-wheels E2 E2, a slower motion is secured, and if one strand of said chain is put upon a sprocket-wheel E2 and the other of said strands upon a sprocket-wheel E an intermediate speed is secured.

G is a lever pivoted at G to a hanger from the frame of the hoist. The lever G is bent at one end and extends between the strands. of the chain F, which engage the pulley F2.

To the other end of the lever G is pivoted at G2 a rod G3, which rod engages the lever-arm B2 atsome distance from its pivot, as indicated in Fig. 2.

The motor 1s p ut in operation, raising the ing the saine about its pivot G', tilting the t lever-arm B2 to its horizontal position, and

closing the throttle-valve.

it will be observed that the guide-rods C2 C2 are directly beneath the cross-head at the center of effort of the earn-surfaces of the double cam D. Tali/*hat l claim is- 1. In a hoisting mechanism, the combination of a rotatable horizontal shaft, a plurality of sprockets thereon, a loop-chain having its two strands passing over two sprockets, a motor to rotate the shaft, a throttle-valve to control said motor, and means adapted to be actuated manually or by contact with another ortion of the mechanism whereby said va ve may be actuated, substantially as described.

2. in a hoist, in combination with a drum, an actuating-motor, means provided with individual lubricating apparatus whereby the 'action of said motor may be controlled, and

.means arranged to simultaneously actuate said controlling means and its connected apparatus, substantially as described.

3. in a hoisting' mechanism, the combination of a druni, a chain carrying a pulley engaging thereover, a niotor arranged to actuate said drinn, 'a throttle-valve controlling the action of said niotor, an arin adapted to actuate the throttle-valve, a lever pivoted to a fixed portion of che mechanism, having anend extending adjacent to said chain, the other end of said arin being connected to the arm controlling the throttle-valve, said. pnlley being adapted to contact the adjacent endk of said lever, substantially as described.

4. In a hoist, the combination of a shaft, a pair of large sprockets on said shaft, a loopchain having its two strands passing over two sprockets on said shaft, a sheave having its Wheel in one loop of said chain and a pair ol sprockets of lesser diameter upon said shaft, for the purpose described.

In testimony whereof l sign this specifica tion in the presence of two witnesses.

diliMiilS LOW/'E lflLl 1lb( (l.

1Witnesses,

@Hannes F. Boeren', ELLIOTT J. S'ronDARD. 

